Atomistic Analysis of Electrolytes: Redox Potentials and Electrochemical Reactions in a Lithium-Ion Battery

The charging safety of electric vehicles is an area of focus in the electric automobile industry. For the purpose of ensuring safety, charging electric vehicles as soon as possible is a goal pursued by the public. In order to ensure the safety of electric vehicles during fast charging and to reduce the cycle life decay of the battery, a simplified multi-particle lithium-ion battery model is proposed, based on the pseudo two-dimensional (P2D) model. The model was developed by considering heterogeneous electrochemical reactions in the negative electrode area. The Butler–Volmer (BV) kinetic equation and the distribution of the pore wall flux in the negative electrode is approximated by the quasi-linear approximation method. Furthermore, this paper also analyzes the conditions of lithium precipitation from the negative electrode of a lithium-ion battery in the case of high charging rates, which has a certain reference significance for fast-charging control applications. The experimental and simulation results show that the model has a high simulation accuracy and can reflect the heterogeneity of electrochemical reactions in the negative electrode of the battery. The model can be adapted to fast-charging control applications.

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Application ofin situMössbauer effect methods for the study of electrochemical reactions in lithium-ion battery electrode materials

Physical Review B ◽

10.1103/physrevb.59.3494 ◽

1999 ◽

Vol 59 (5) ◽

pp. 3494-3500 ◽

Cited By ~ 36

Author(s):

R. A. Dunlap ◽

Ou Mao ◽

J. R. Dahn

Keyword(s):

Lithium Ion Battery ◽

Electrode Materials ◽

Lithium Ion ◽

Electrochemical Reactions ◽

Battery Electrode

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Voltage induced electrochemical reactions in the single lithium-rich layer-oxide nanoparticles

Physical Chemistry Chemical Physics ◽

10.1039/c5cp00230c ◽

2015 ◽

Vol 17 (15) ◽

pp. 10257-10264 ◽

Cited By ~ 12

Author(s):

Tao Li ◽

Bohang Song ◽

Li Lu ◽

Kaiyang Zeng

Keyword(s):

Electric Field ◽

Lithium Ion Battery ◽

Building Block ◽

Lithium Ion ◽

Electrochemical Reactions ◽

Oxide Nanoparticles

As a crucial building block of the electrode in the lithium-ion battery (LIB), single nanoparticles that respond to an electric field have rarely been characterized experimentally.

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A review of lithium ion batteries electrochemical models for electric vehicles

E3S Web of Conferences ◽

10.1051/e3sconf/202018504001 ◽

2020 ◽

Vol 185 ◽

pp. 04001

Author(s):

Jiaping Zhou ◽

Bo Xing ◽

Chunyang Wang

Keyword(s):

Lithium Ion Battery ◽

Lithium Ion ◽

Iterative Solution ◽

Research Progress ◽

Electrochemical Reactions ◽

Model Parameters ◽

Mechanism Analysis ◽

Simulation Research ◽

Computational Speed ◽

Electrochemical Model

The electrochemical model can reflect the electrochemical reactions inside the lithium ion battery, and the model parameters have practical physical significance. Therefore, it is commonly used in the simulation research of the life prediction and the cell decay mechanism analysis of the lithium ion battery. This paper mainly introduces three commonly used electrochemistry models: P2D model, SP model and extended SP model. The origin and research progress of three kinds of electrochemical models are described. The characteristics of the three models are analyzed and compared. P2D model can describe the battery reactions comprehensively, but the iterative solution is complicated. The SP model simplifies some electrochemical reactions and improves the computational speed of the model, but the accuracy is decreased. In order to solve the shortcoming of SP model, the electrochemical reaction omitted from SP model is introduced again, and the approximate solution is solved by mathematical method, so as to realize the balance between precision and computational complexity of the model. Based on the above analysis and the application scenarios of lithium ion battery, the further development of the lithium ion battery electrochemical model is prospected.

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